Gallatin County

Human health related groundwater quality testing suggestions

Image of Gallatin county

Nitrate and Bacteria (E. coli and total coliform) should be tested regularly, ideally every year.

Lead can be a concern if household plumbing was installed prior to the mid-1990s, especially if well water is corrosivve.

Copper can be an issue if household plumbing includes copper and well water is corrosive.

Arsenic, Copper, Fluoride, Nitrate, Uranium have been found above the human health threshold in this and/or a neighboring county.

The Gallatin Local Water Quality District suggests that private well owners in Gallatin County should test their wells for nitrate and Total Coliform plus E. coli bacteria at least once per year. The following additional tests are also recommended at least once and ideally every 3-5 years: ---For residents west of the West Gallatin River, test for arsenic, uranium, and fluoride. ---For residents in the Bridger Range area, test for fluoride. ---For residents east of the Bridger Range and in the Trail Creek area, test for selenium. ---For residents near West Yellowstone, test for arsenic. ---For residents in any mountainous or foothills location, consider a broader screening for other metals. ---For residents with homes built or plumbing installed prior to the 1990s, test for lead. ---If you have copper plumbing and your water has a metallic taste and/or you notice blue-green staining, test for copper.